Greens were damaged and Palestinian flags placed within the grounds of a Donald Trump-owned golf resort in an act of vandalism described as “childish” by management.
The attack on the golf resort in Doonbeg Co Clare took place at some point between 5pm and midnight on Wednesday.
In a statement, the club said it is working to fix the damage, which included a number of holes dug on two of the greens.
Palestinian flags were placed within the grounds, RTÉ is reporting.
“This was a childish, criminal act but the incredible team at Trump Doonbeg will ensure it does not impact business,” the club said.
“We have the greatest course anywhere in the world and we are so proud of the tremendous success and we look forward to a great season ahead.”
Gardai said they were investigating an incident of criminal damage at a “commercial premises in West Clare” but did not name the Trump International Golf Links and Hotel.
“Investigating gardaí are appealing for any witnesses to this incident come forward,” a garda spokesperson said.
“In particular, gardaí are appealing to anyone who was in the West Clare area between approximately 5pm and midnight yesterday, and anyone that may have video footage.”
The incident happened on the day Taoiseach Micheál Martin met with President Trump at the White House.
Doonbeg, owned by the Trump Organisation for over a decade, did come up in conversations between the two leaders, according to reports.